I checked my system and it seems it works as it should, we must find now the differences.

The first thing is that you should be able to show the level sensor states on the ProfiLux screen. It is really weird that you don't see them.

Please do these display-settings:

DisplaySettings.jpg

with these settings I can see on my display this:

1.
Level3456.PNG
all sensors (1-6) contact to water

2.
Level123456.PNG
senors 1 + 2 no contact to water

please let us first have this state in your system before we continue
as long as you can't see this it is not sure that the settings, hardware setup or the firmware version are as expected